Li Jiang-ping, Zhang Hong-hai, Yang Gui-peng
Huan Jing Ke Xue. 2015 Jan;36(1):49-55.
Dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) are the most important biogenic organic dimethylated sulfur compounds in the ocean. The spatial distributions of these three sulfur compounds and their influencing factors were investigated in the East China Sea in June 2013. The mean concentrations of DMS, DMSPd, DMSPp, DMSOd and DMSOp in the surface seawater were 4.70, 7.00, 27.83, 13.66 and 10.78 nmol x L(-1), respectively. The horizontal distributions of DMS, DMSP and DMSO exhibited the similar patterns to that of chlorophyll a (Chl-a), with high values in coastal regions and low values in the open sea. DMS, DMSPd and DMSOp concentrations were significantly correlated with the levels of Chl-a, indicating that phytoplankton biomass might play an important role in controlling the concentrations of these sulfur compounds in the East China Sea. Moreover, positive relationships were observed between DMS and DMSPd and between DMSOd and DMS in the study area, which implied that the microbial degradation of DMSPd was the main source of DMS and DMSOd came mostly from the oxidation of DMS. The sea-to-air flux of DMS from the East China Sea in summer ranged from 0.62 to 33.98 micromol x (m2 x d)(-1), with an average of 9.71 micromol x (m2 x d)(-1).
二甲基硫（DMS）、二甲基磺基丙酸（DMSP）和二甲基亚砜（DMSO）是海洋中最重要的生物源有机二甲基化硫化合物。2013年6月对东海这三种硫化合物的空间分布及其影响因素进行了调查。表层海水中DMS、溶解态DMSP（DMSPd）、颗粒态DMSP（DMSPp）、溶解态DMSO（DMSOd）和颗粒态DMSO（DMSOp）的平均浓度分别为4.70、7.00、27.83、13.66和10.78 nmol·L⁻¹。DMS、DMSP和DMSO的水平分布与叶绿素a（Chl-a）相似，在沿海地区值高，在公海值低。DMS、DMSPd和DMSOp的浓度与Chl-a水平显著相关，表明浮游植物生物量可能在控制东海这些硫化合物的浓度方面发挥重要作用。此外，研究区域内DMS与DMSPd之间以及DMSOd与DMS之间呈正相关，这意味着DMSPd的微生物降解是DMS的主要来源，DMSOd主要来自DMS的氧化。夏季东海DMS的海-气通量范围为0.62至33.98 μmol·(m²·d)⁻¹，平均为9.71 μmol·(m²·d)⁻¹。
